On the card with a scale of 1:100,000 the lake has length of 2 cm What scale of the card on which the same lake has length of 0.8 cm?

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Let's find the actual length of the lake, 2*100000=200000sm to find the scale of the card on which the same lake has length of 0.8 cm it is necessary to divide the actual length of the lake, at lake length on card 200000/0.8=250000 the scale of this card means 1:250000 answer are equal: 1:250000
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